CommunityForumWikiBlogLearn
Sensors
Liquid Sensors

Gravity: Digital Water Flow Sensor

SKU: SEN0216

The YF-S401 Water Flow Sensor measures liquid flow by detecting the pulse signal generated as the internal rotor spins. It features a plastic housing, magnetic rotor, and Hall-effect sensor, providing a simple and reliable way to monitor flow rate with any microcontroller. Ideal for coffee machines, irrigation systems, and general water-control applications.

Front of Arduino water flow sensor with red and black wires-DFRobot product sku:SEN0216 image.

Downloadable Resources

  • Docs
  • Tech Specs

    • Specification

    Parameter Value
    Inner Diameter 4 mm
    Outside Diameter 7 mm
    Proof Water Pressure <0.8 MPa
    Water Flow Range 0.3-6 L/min
    Voltage Range 5~12 V
    Operating Current 15 mA (DC 5V)
    Insulation Resistance >100 MΩ
    Accuracy ±5% (0.3-3L/min)
    The Output Pulse High Level >4.5 VDC (DC input voltage 5 V)
    The Output Pulse Low Level <0.5 VDC (DC input voltage 5 V)
    Output Pulse Duty Ratio 50% ± 10%
    Water-flow Formula 1L = 5880 square waves
    Working Humidity Range 35% ~ 90% RH (no frost)
    Dimension 583526 mm/2.281.371.02 inches
    Weight 30g

    Pinout

    SEN0216 Gravity: Digital Water Flow Sensor For Arduino Board Overview
    Number Color Name Description
    1 Green Signal Pulse Signal
    2 Red VCC 5~12V
    3 Black GND GND

    Pulse Signal

    SEN0216 Gravity: Digital Water Flow Sensor For Arduino Pulse Signal

    Was this article helpful?

    TOP